How hard is it to do?

[Shiloh 24]

I've been kicking around the idea of hollowing out the cat on my truck, I know it'll prolly lose back pressure and lose a little low end but idc at this point. How hard is it to make a non-fouler for the downstream o2 sensor? I don't really want a constant CEL and every tenth of a mpg counts as far as I'm concerned now.

 

[Bigtman07]

Well you can just buy the non fouler. Esentially its a a piece of threaded pipe.

 

[Redtruck-VA]

This should answer a lot of your questions. http://www.ramforum.com/f50/will-i-get-engine-light-4302/

 

[nim81]

i tried to hollow out the cat on my 99 durango and it was a *****! ended up just running straight pipes to a chambered magnaflow. not worth the time imo.

 

[HemiBabe]

How come you wanna hollow it out? If it were me, I'd just buy a high-flow cat and replace it. It's basically the same thing.... Hollowing them out is a big pain in the ass

 

[onebadbee]

high flow cats vs our cats on our truck pointless and a waste of money

our cats flow well enough to just make them 3 inch or however big you wanna go

the sensors on our trucks will still throw a code with high flow cats

its hit or miss with the high flow cats but leave your cats alone

if you plan on drag racing then take them off but if not dont waste the moolah

 

[RubberFrog]

You won't gain any mpg from this.

 

[4X HEMI]

I put a hi flow cat on mine, Magnflow polished SS, it cost me $90 and I don't get any codes from it at all.

 

[Redtruck-VA]

Looking at the 03 OEM cat side by side with Magnaflow Hiflow cat, the OEM is a bigger cat and when I replaced my OEM cat with the Mag HiFlow the truck slowed a couple of 10th running 0-60 mph.